Floor
Another word for a hole in the ground is a pit or a cavity.
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Another name for geothermal energy is ground source heat.
A pit or depression.
Firm, stable, solid, flat.
Another name for ground grain is flour.
Another word for a hole in the ground is a pit or a cavity.
Battlezone, frontline, combat area, battle ground, or war zone. Those words mean combat zone.
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The word guidelines is a noun and means directions. Other words that mean guidelines are ground rules, codes, protocols, instructions, and markers.
Terra Firma is another term for solid ground
While lightning typically goes from a cloud to the ground and does rarely move upward from the ground, going from one part of the earth to another is unnecessary. Given a piece of negatively charged ground and another positively charged one, the path of least resistance would be through the ground rather than through the air.
"Solid ground"
maybe " The Ground Floor "
Mausoleum
bankrupt